Adding Editable Table

Adding Editable Table

I have my customer information on a form and editable table for a comments section on the same page. I add it but it doesn't record the information. What should I do to record the information on the editable table.
Thanks!

This is what I want to do but It's not similar to a form. When I build a form, on the action create and update entity for the source I can choose YOURENTITYForm.Record. But I don't have the .record for my editable table. What Source sould I choose for my editable table? Sorry.